v3.26.1
Share-based payments - Option grants outstanding (Details)
 9 Months Ended 12 Months Ended
May 31, 2026
shares
$ / shares
Aug. 31, 2025
shares
$ / shares
Share-based payments    
Number of options, Beginning balance | shares 27 40
Number of options, Granted | shares   5
Number of options, Forfeited | shares   (4)
Number of options, Expired | shares (4) (14)
Number of options, Ending balance | shares 23 27
Weighted average exercise price, Beginning balance (in dollars per share) | $ / shares $ 1,848,042.54 $ 2,002,324.7
Weighted average exercise price, Granted (in dollars per share) | $ / shares   2,644
Weighted average exercise price, Forfeited (in dollars per share) | $ / shares   2,349,000
Weighted average exercise price, Expired (in dollars per share) | $ / shares 3,092,526.93 1,486,647.1
Weighted average exercise price, Ending balance (in dollars per share) | $ / shares $ 1,725,522.61 $ 1,848,042.54